Trying Lesbian Sex with My Step-Sister

I still can't fucking believe it. Came out to Brin thinking she'd flip. Instead she laughed like I told a joke, not like I'd just handed her my goddamn heart. The words wouldn't stop once I started. Told her everything, every filthy thought I'd kept buried. She listened. Then that look changed. Suddenly she was saying yes, saying we could try. Next thing I knew her mouth was on mine, hot and hungry. I shoved her against the wall. Her hands tore at my shirt while mine got her jeans open. We didn't make it to the bed. We went at each other right there on the floor, legs tangled, clothes half off, grinding and gasping like we might die if we stopped. Her fingers were inside me before I could catch my breath, and I was right there with mine buried in her, slick and fast. She moaned my name like a curse. I bit her shoulder and kept going.